Can ghosts sing?

My grandmother recently passed away and I had to go and stay in her house for a few days while it was having some minor renovations prior to being sold. On numerous occasions both day and night I thought I could hear the sound of faint singing but I was unable to find the source of the sound . My grandmother was a... show more My grandmother recently passed away and I had to go and stay in her house for a few days while it was having some minor renovations prior to being sold. On numerous occasions both day and night I thought I could hear the sound of faint singing but I was unable to find the source of the sound . My grandmother was a professional opera singer when she was a young woman but gave up her career to be a wife and mother and I think always somewhat regretted her decision. Could she have returned to what she loved doing in the afterlife?
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